These are a natural progression of the ones I made for the shadowbox. The little metal greeblie is a copper brick hanger (found at any hardware store) with certain parts sawed off. I took two of those and joined them together, with an N40 magnet behind them, and another N40 sandwiched between them.
The hangers will be mounted (probably epoxy, not sure yet) directly to the inside of the double doors. The hooks (which are wonderfully, coincidentally, shaped like bat gauntlet fins), along with the magnets, will nicely hold the Batarang in place, without making it too difficult to simply reach up and pull one down.
Still waiting on a few more magnets to arrive so I can build the rest of the magnetic mounts. I'll likely have the lumber for the front doors next weekend to attach these, as well as the hinges and handles.